Dear Bill, imagine they are " brothers". Only the big one had a very long root so I ve potted separately from the begining. Spray every day or every other day. Every 2 weeks I have an organic fertilizer from Malaysia from the lady seller. I use for a month now every 2 weeks another organic fertilizer from the same lady, has only nitrogen. I used Atonik also 3 treatments 14 days apart from each treatment ( not in the same day with the fertilizer). Thank you for your advise, Raluca.

Raluca, you are probably in the Tropical Lowlands but to get good advice you need to tell the posters here where you live. Might be the photos, but those babies look to be too deep a green. Perhaps not enough light?

I agree, unless the photos are making the green look so green, they appear not to be getting enough light....be careful though, don't over do it, they will burn easily. Another thing, I would put them in a much finer bark. What you are using looks like a mix that would be suitable for mature Cattleyas, or similar type plants. Overall though, they really don't look bad at all. I guess just a bit slow.

Bill

I agree, they could use more light.

Jane

There are bad photos :). Thank you for all advises. They are in the window facing south. It is light and sunny all day long. I will take some proper photos in natural light. I live in South Eastern Europe, northern emisphere. Now is summer, we have outside 36 degrees Celcius, inside the house is 30 degrees without air conditioning. I set the AC to 23 degrees but it barely makes 26 degrees inside. They have light from 6,30 am till 21,00 and sunny is from 7,30 am till 17,00. Thank you!

Raluca.